Oppn 'peeved' about GST win: Barnett

West Australian Premier Colin Barnett says he is delighted with the proposed changes to the GST distribution system and claims the opposition is peeved he has succeeded for the state.

Prime Minister Malcolm Turnbull announced at the Liberal state conference on Saturday he wanted to put in a floor to how low a state's share of the GST could fall, after WA's take dropped to about 30 cents back for every dollar it generated.

Mr Barnett told reporters at the conference on Sunday the floor would provide long-term security and stability in revenue, which would allow the state government to plan for health, education, roads and other issues.

"We will then be in a position also to stabilise and reduce state debt, so that gives me great confidence that we can continue all the programs and services of the state government," he said.

The premier also took the opportunity to take a swipe at the opposition, saying Labor had repeatedly scorned and ridiculed his attempts to get a fair deal for WA.

"At no stage have they come out and provided any sort of support, and indeed, they've gone at lengths to try to blame the GST issue on the current state government," he said.

Mr Barnett said Labor leader Mark McGowan had failed to stand up for WA on the issue - a claim the opposition leader had repeatedly made about the premier before the prime minister's announcement.